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1.南京邮电大学 电子与光学工程学院、柔性电子(未来技术)学院,南京 210023
2.南京先进激光技术研究院,南京 210038
张优,硕士。E-mail:zyou3619@163.com
收稿:2024-03-18,
修回:2024-04-04,
纸质出版:2025-04-10
移动端阅览
张优,胡芳仁,赵晓燕,等. 基于改进型曼彻斯特编码的UWOC解调算法设计[J].光通信研究,2025(2):240013.
Zhang Y, Hu F R, Zhao X Y, et al. Design and Implementation of Modulation and Demodulation Algorithm for UWOC based on Improved Manchester Coding[J]. Study on Optical Communications, 2025(2): 240013.
张优,胡芳仁,赵晓燕,等. 基于改进型曼彻斯特编码的UWOC解调算法设计[J].光通信研究,2025(2):240013. DOI: 10.13756/j.gtxyj.2025.240013.
Zhang Y, Hu F R, Zhao X Y, et al. Design and Implementation of Modulation and Demodulation Algorithm for UWOC based on Improved Manchester Coding[J]. Study on Optical Communications, 2025(2): 240013. DOI: 10.13756/j.gtxyj.2025.240013.
【目的】
2
为了满足高速水下无线光通信(UWOC)技术工程化的要求,改善高速率通信时开关键控(OOK)等依赖阈值解调的调制方式在水下信道较差时通信误码率(BER)较高的问题,文章对常用的水下光通信调制方式进行了对比仿真分析,提出了一种脉冲位置调制(PPM)和曼彻斯特编码相结合的、无阈值判决的改进型调制解调算法。
【方法】
2
文章通过滑动均值滤波提高系统信噪比(SNR);对PPM帧头进行并行多路无阈值判决实现帧同步,为曼彻斯特编码解调提供时间校准基础;最后在数据部分使用曼彻斯特编码副帧头和里德-所罗门(RS)纠错码实现低BER的高速通信。在现场可编程门阵列(FPGA)上对该算法进行了设计实现,搭建了使用该方法的UWOC系统,在不同环境和距离下进行了BER测试。
【结果】
2
测试结果表明,基于文章所提解调算法的UWOC系统在通信速率为50 Mbit/s、通信距离为10 m时,在室内清澈水池中的BER为10
-5
,近岸湖水中的BER为10
-3
。
【结论】
2
在10 m距离的近岸湖水中,相较于OOK和PPM等调制方法,使用文章所提改进型曼彻斯特编码调制可以实现更可靠的50 Mbit/s通信。
【Objective】
2
To meet the requirements of the engineering of high-speed Underwater Wireless Optical Communication (UWOC) technology
and to address the issue of high Bit Error Rate (BER) in underwater channels when using modulation methods such as On/Off Keying (OOK) that rely on threshold demodulation for high-speed communication
this paper conducts comparative simulation analysis of commonly used underwater optical communication modulation methods and proposes an improved modulation and demodulation algorithm that combines Pulse Position Modulation (PPM) with Manchester encoding and does not require threshold decision-making.
【Methods】
2
The paper uses sliding mean filtering to improve the Signal to Noise Ratio (SNR). The frame synchronization is then achieved by parallel multi-path threshold-free decision-making on the PPM frame header
providing a time calibration basis for Manchester encoding and demodulation. Finally
high-speed communication system with low BER is realized by using Manchester encoding sub-frame headers and Reed-Solomon (RS) error-correcting codes in the data part. The algorithm is designed and implemented on a Field Programmable Gate Array (FPGA)
and a UWOC system using this method is built to conduct BER tests under different environments and distances.
【Results】
2
The test results show that the UWOC system based on this demodulation algorithm has an BER of 10
-5
in indoor clear water pools and 10
-3
in nearshore lake water at a communication speed of 50 Mbit/s and a communication distance of 10 m.
【Conclusion】
2
The proposed algorithm in this paper is applied in nearshore lake water with a distance of 10 meters
compared to modulation methods such as OOK and PPM
using modified Manchester encoding modulation can achieve more reliable 50 Mbit/s communication.
杜劲松 , 周田华 , 陈卫标 , 等 . 基于LDPC和PPM的水下光通信性能分析 [J ] . 激光与光电子学进展 , 2016 , 53 ( 12 ): 100 - 106 .
Du J S , Zhou T H , Chen W B , et al . Performance Analysis of Underwater Optical Communication based on LDPC and PPM [J ] . Laser & Optoelectronics Progress , 2016 , 53 ( 12 ): 100 - 106 .
刘鹏展 , 王林宁 , 胡芳仁 , 等 . 水下光通信技术的研究与展望 [J ] . 数字海洋与水下攻防 , 2022 , 5 ( 4 ): 329 - 334 .
Liu P Z , Wang L N , Hu F R , et al . Research and Prospect of Underwater Optical Communication Technology [J ] . Digital Ocean & Underwater Warfare , 2022 , 5 ( 4 ): 329 - 334 .
Duntley S Q . Light in the Sea [J ] . Journal of the Optical Society of America , 1963 , 53 ( 2 ): 000214 .
满仲麒 , 谭玉彬 , 刘显著 , 等 . 高速水下无线光通信系统研究进展 [J ] . 光通信研究 , 2023 ( 4 ): 1 - 6 .
Man Z Q , Tan Y B , Liu X Z , et al . Research Progress of High-speed Underwater Wireless Optical Communication System [J ] . Study on Optical Communications , 2023 ( 4 ): 1 - 6 .
刘润芃 , 佟首峰 , 张鹏 , 等 . 水下光通信技术研究 [J ] . 光通信研究 , 2023 ( 4 ): 11 - 13 .
Liu R P , Tong S F , Zhang P , et al . Research on Underwater Optical Communication Technology [J ] . Study on Optical Communications , 2023 ( 4 ): 11 - 13 .
林志琦 , 宋国明 , 刘涛 , 等 . 车辆间大气激光移动通信调制方式研究 [J ] . 光子学报 , 2009 , 38 ( 2 ): 334 - 338 .
Lin Z Q , Song G M , Liu T , et al . Modulation Schemes of Mobile Atmosphere Laser Communication between Autos [J ] . Acta Photonica Sinica , 2009 , 38 ( 2 ): 334 - 338 .
韩彪 . 面向深海应用的水下双向无线光通信研究 [D ] . 西安 : 中国科学院大学(中国科学院西安光学精密机械研究所) , 2019 .
Han B . Study on the Bidirectional Underwater Wireless Optical Communication for Deep Sea Application [D ] . Xi’an, China : University of Chinese Academy of Sciences (Xi’an Institute of Optics and Precision Mechanics of CAS) , 2019 .
米乐 , 胡思奇 , 周田华 , 等 . 基于低密度奇偶校验码和脉冲位置调制的水下长距离光通信系统设计 [J ] . 中国激光 , 2018 , 45 ( 10 ): 225 - 231 .
Mi L , Hu S Q , Zhou T H , et al . Long Distance Underwater Laser Communication System based on Low-density Parity Check Codes and Pulse-position Modulation [J ] . Chinese Journal of Lasers , 2018 , 45 ( 10 ): 225 - 231 .
Qi Z , Wang L , Liu P , et al . Full-duplex Underwater Wireless Blue Light Communication [J ] . Optics Express , 2023 , 31 ( 6 ): 9330 - 9338 .
Huang X , Yang F , Song J . Hybrid LD and LED-based Underwater Optical Communication: State-of-the-art, Opportunities, Challenges, and Trends [J ] . Chinese Optics Letters , 2019 , 17 ( 10 ): 100002 .
柯熙政 , 梁静远 , 许东升 , 等 . 无线光通信类脉冲位置调制技术研究进展 [J ] . 光电工程 , 2022 , 49 ( 3 ): 3 - 21 .
Ke X Z , Liang J Y , Xu D S , et al . Research Progress of Pulse Position Modulation Technology in Optical Wireless Communication [J ] . Opto-Electronic Engineering , 2022 , 49 ( 3 ): 3 - 21 .
吴凡 . 无线激光通信中基于双伽马信道的反曼彻斯特码研究 [D ] . 西安 : 西安电子科技大学 , 2018 .
Wu F . Research on IMC over Gamma-Gamma Channel in WLC [D ] . Xi’an, China : Xidian University , 2018 .
Cochenour B M , Mullen L J , Laux A E . Characterization of the Beam-spread Function for Underwater Wireless Optical Communications Links [J ] . IEEE Journal of Oceanic Engineering , 2008 , 33 ( 4 ): 513 - 521 .
Oubei H M , ElAfandy R T , Park K H , et al . Performance Evaluation of Underwater Wireless Optical Communications Links in the Presence of Different Air Bubble Populations [J ] . IEEE Photonics Journal , 2017 , 9 ( 2 ): 7903009 .
Shannon C E . A Mathematical Theory of Communication [J ] . ACM SIGMOBILE Mobile Computing and Communications Review , 2001 , 5 ( 1 ): 3 - 55 .
Lacovara P . High-bandwidth Underwater Communications [J ] . Marine Technology Society Journal , 2008 , 42 ( 1 ): 93 - 102 .
王庆港 . 基于极化码的水下无线光通信系统设计与算法改进 [D ] . 西安 : 西安电子科技大学 , 2023 .
Wang Q G . Research on Underwater Wireless Optical Communication System based on Polar Codes [D ] . Xi’an, China : Xidian University , 2023 .
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